The following are some statements about normal hydrogen electrode (NHE)

I)  when a ‘Zn’ electrode is in combination of NHE, Zn electrode acts as cathode

II)  when a ‘Cu’ electrode is in combination with NHE, Cu electrode is the anode

III)  when a ‘Ag’ electrode is in combination with NHE, Ag electrode is the anode

IV)  when a chlorine electrode is in combination with NHE, chlorine electrode is the anode